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PCB Back Board Production Technology
Feb 26, 2018

  PCB backplane PCB manufacturing industry has always been the professional nature of products. Its design parameters and most other circuit boards are very different, need to meet some of strict requirements, noise tolerance, signal integrity, and require a PCB backplane design that follows its own design rules. Due to the characteristics of these PCB backplanes, the manufacturing requirements such as equipment specifications and equipment handling will differ greatly. Future PCB backplanes are larger and more complex and require higher clock frequencies and bandwidth than before. The number of signal tracks and nodes continues to increase. A PCB backplane containing more than 50,000 nodes is no longer surprising.

  The ever-increasing demands of users of increasingly complex large PCB backplanes that can operate with unprecedented high bandwidth required device processing capabilities beyond traditional PCB production lines. In particular, the PCB backplane is larger, heavier, thicker, with more layers and perforations than the standard PCB. Furthermore, the required line width and tolerances require a hybrid bus structure and assembly technique and are further elaborated.

  The most common differences between traditional PCB and PCB backplane are the size and weight of the board, and the processing problems of large heavy raw material panels. A typical size for PCB manufacturing equipment is 24 x 24 inches. Users, especially telecom users, require a larger PCB backplane. For this reason, confirmation and purchase of a large sheet transport tool are required. Designers who solve the alignment problem of large pin count connectors had to add an additional layer of copper and the number of PCB backplane layers increased. Under severe EMC and impedance conditions, you need to increase the number of layers in the design to ensure adequate shielding, reduce crosstalk, and improve signal integrity.

  When inserting a high-power application card into the PCB backplane, the thickness of the copper layer must be moderate to supply the current required for the card to operate properly. All of these factors lead to an increase in the average weight of the backplane PCB, which not only requires other delivery conveyor systems that must not be secured for large transfer sheet sheets, but also weight The fact that you must consider to get.

  The need for a PCB backplane with a thinner core layer and more layers requires two diametrically opposed requirements for the delivery system. While the conveyor and conveyor means must be able to provide both 10 millimeters, it must be able to transport harmless thickness less than 0.10 millimeters (0.004 inches) pick up to large sheet metal pieces (0.394 inches) The thickness of the board, 25 kg (56 pounds) without losing the board.